Table 1.
Demographic and clinical characteristics.
| Demographic and clinical characteristics | Preterm birth ≤ 36 6/7 weeks | Term birth ≥ 38 0/7 weeks | p-value, χ2 test, *Mann–Whitney test |
|---|---|---|---|
| Total (N = 152) | N = 61 | N = 91 | |
| Maternal age at delivery, years; Mean ± SD | 32.24 ± 4.51 | 31.40 ± 4.03 | P = 0.151* |
| Pre-pregnancy BMI (kg/m2) mean ± SD | 23.95 ± 4.96 | 23.80 ± 4.33 | P = 0.717* |
| Underweight (<18.5) | 4 (6.6) | 10 (6.6) | P = 0.075, χ2 = 6.901 |
| Normal Weight (18.5-24.9) | 41 (67.2) | 52 (57.1) | |
| Overweight (25–29.9) | 6 (9.8) | 24 (26.4) | |
| Obese (>30) | 10 (16.4) | 9 (9.9) | |
| Birthweight (g; mean ± SD) | 1,852 ± 761 | 3,477 ± 455 | P < 0.0001* |
| Parity | P = 0.08, χ2 = 5.061 | ||
| 0 | 31 (50.8)/61 | 30 (33.0)/91 | |
| 1 | 24 (39.3)/61 | 44 (48.4)/91 | |
| 2–4 | 6 (9.8)/61 | 16 (17.6)/91 | |
| Gestational diabetes mellitus | 12 (19.7) | 9 (9.9) | P = 0.098, χ2 = 2.935 |
| Working status—employed | 48 (80.0) | 73 (81.1) | P = 1.000, χ2 = 0.028 |
| Smoking | P = 0.497, χ2 = 3.377 | ||
| Yes | 7 (10.5) | 9 (9.9) | |
| No | 52 (85.2) | 77 (84.6) | |
| Quit before pregnancy | 2 (3.3) | 5 (5.5) | |
| Marital status—in partnership | P = 0.326, χ2 = 2.243 | ||
| Fetal sex | 60 (98.4) | 91 (100) | P = 0.409, χ2 = 0.800 |
| Female | 25 (41.0) | 44 (48.4) | |
| Male | 36 (59.0) | 47 (51.6) | |
| Gynecological surgeries | 18 (29.5) | 16 (17.6) | P = 0.084, χ2 = 2.991 |
| Previous PTB | 7 (11.5) | 3 (3.3) | P = 0.046, χ2 = 3.975 |
| Bleeding before 14th week of gestation | 24 (40.7) | 17 (18.9) | P = 0.005, χ2 = 8.483 |
| Urogenital infection | 5(8.5) | 8 (8.9) | P = 1.000, χ2 = 0.008 |
| Asymptomatic bacteriuria | 1 (1.7) | 3 (3.3) | P = 1.000, χ2 = 0.366 |
| Antibiotic use during pregnancy | 4 (6.6) | 1 (1.1) | P = 0.152, χ2 = 3.764 |
| Tocolytic therapy (Atosiban) | 4 (6.6) | 0 (0.0) | P = 0.013, χ2 = 6.128 |
Demographic and clinical characteristics in preterm and term deliveries. Parametric continuous variables were tested using an unpaired t-test and are given as means ± standard deviations; nonparametric continuous variables were tested using the Mann–Whitney U-test. BMI, body mass index; PTB, preterm birth; TB, term birth. Statistically significant differences between the PTB and TB groups are given in bold. *Mann-Whitney test.